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行方不明， ゆくえふめい
1. missing (of a person), lost, unaccounted for, whereabouts unknown
失踪，下落不明，去向不详
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思う， 想う， 憶う， 念う， おもう
1. to think, to consider, to believe, to reckon
2. to think (of doing), to plan (to do)
3. to judge, to assess, to regard
4. to imagine, to suppose, to dream
5. to expect, to look forward to
6. to feel, to be (in a state of mind), to desire, to want
...
思考、考虑、相信、估计；考虑(去做)，计划(去做)；评判、评估、看待
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
